IGC Code: International Code for the Construction and Equipment of Ships carrying Liquefied Gases in Bulk, 2016 Edition (IA104E)

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The purpose of this Code is to provide an international standard for the safe carriage, by sea in bulk, of liquefied gases and certain other substances that are listed in chapter 19. Through consideration of the products carried, it prescribes the design and construction standards of the ships involved and the equipment they should carry to minimize the risk to the ship, its crew and the environment.

At its forty-eighth session (June 1983), the Maritime Safety Committee (MSC) of the International Maritime Organization (IMO) adopted amendments to the International Maritime Convention for the Safety of Life at Sea, 1974 (SOLAS), by resolution MSC.6(48).

The amendments consisted of complete replacement texts of chapters III and VII and changes in chapters II -1, II -2 and IV.

The new chapter VII made the provisions of the International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk (IGC Code), which was adopted by resolution MSC.5(48), mandatory under the 1974 SOLAS Convention.

The new 2016 edition of the IGC Code incorporates the amendments adopted by the MSC at its ninety-third session (May 2014) by resolution MSC.370(93). These amendments, which entered into force on 1 January 2016, consist of a complete replacement text of the IGC Code.

Unless expressly provided otherwise, the requirements of the IGC Code, as amended by resolution MSC.370(93), apply to ships whose keels are laid, or which are at a similar stage of construction, on or after 1 July 2016.

For ships constructed on or after 1 July 1986 and before 1 July 2016, unless expressly provided otherwise, the Administration shall ensure that such ships comply with the requirements which are applicable under the IGC Code, as adopted by resolution MSC.5(48) and as amended by resolutions MSC.17(58), MSC.30(61), MSC.32(63), MSC.59(67), MSC.103(73), MSC.177(79) and MSC.220(82).

17.18 Propylene oxide and mixtures of ethylene oxide-propylene oxide with ethylene oxide content of not more than 30% by weight

17.19 Vinyl chloride

17.20 Mixed C4 cargoes

17.21 Carbon dioxide: high purity

17.22 Carbon dioxide: reclaimed quality

Chapter 18 Operating requirements

18.1 General

18.2 Cargo operations manuals

18.3 Cargo information

18.4 Suitability for carriage

18.5 Carriage of cargo at low temperature

18.6 Cargo transfer operations

18.7 Personnel training

18.8 Entry into enclosed spaces

18.9 Cargo sampling

18.10 Cargo emergency shutdown (ESD) system

18.11 Hot work on or near cargo containment systems

18.12 Additional operating requirements

Chapter 19 Summary of minimum requirements

Appendices

Appendix 1 IGC Code Product Data Reporting Form

Appendix 2 Model form of International Certificate of Fitness for the Carriage of Liquefied Gases in Bulk

Appendix 3 Example of an addendum to the International Certificate of Fitness for the Carriage of Liquefied Gases in Bulk

Appendix 4 Non-metallic materials

Appendix 5 Standard for the use of limit state methodologies in the design of cargo containment systems of novel configuration

A​​s a specialized agency of the United Nations, IMO is the global standard-setting authority for the safety, security and environmental performance of international shipping. Its main role is to create a regulatory framework for the shipping industry that is fair and effective, universally adopted and universally implemented.

In other words, its role is to create a level playing-field so that ship operators cannot address their financial issues by simply cutting corners and compromising on safety, security and environmental performance. This approach also encourages innovation and efficiency.

Shipping is a truly international industry, and it can only operate effectively if the regulations and standards are themselves agreed, adopted and implemented on an international basis. And IMO is the forum at which this process takes place.

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Ship survival capability and location of cargo tanks IGC CODE 2016 EDITION 23 Detail Cargo tank CL B.L. Detail Cargo tank shell Insulation Inner bottom Outer shell (bottom shell) B.L.Moulded line Moulded line Protective distance Cargo tank shell Insulation Outer shell (side shell) Moulded line Moulded line Protective distance CL Independent prismatic tank Figure 2.5(a): Protective distance Ship survival capability and location of cargo tanks IGC CODE 2016 EDITION 29 .6 a type 3G ship less than 80 m in length shall be assumed to sustain damage anywhere in its length, except involving transverse bulkheads spaced further apart than the longitudinal extent of damage speci?ed in 2.3.1.1.1 and except damage involving the machinery space when located after. 2.6.2 In the case of small type 2G/2PG and 3G ships that do not comply in all respects with the appropriate requirements of 2.6.1.3, 2.6.1.4 and 2.6.1.6, special dispensations may only be considered by the Administration provided that alternative measures can be taken which maintain the same degree of safety. The nature of the alternative measures shall be approved and clearly stated and be available to the port Administration. Any such dispensation shall be duly noted on the International Certi?cate of Fitness for the Carriage of Lique?ed Gases in Bulk referred to in 1.4.4. 2.7 Survival requirements Ships subject to the Code shall be capable of surviving the assumed damage speci?ed in 2.3, to the standard provided in 2.6, in a condition of stable equilibrium and shall satisfy the following criteria. 2.7.1 In any stage of ?ooding: .1 the waterline, taking into account sinkage, heel and trim, shall be below the lower edge of any opening through which progressive ?ooding or down?ooding may take place. Such openings shall include air pipes and openings that are closed by means of weathertight doors or hatch covers and may exclude those openings closed by means of watertight manhole covers and watertight ?ush scuttles, small watertight cargo tank hatch covers that maintain the high integrity of the deck, remotely operated watertight sliding doors and sidescuttles of the non-opening type; .2 the maximum angle of heel due to unsymmetrical ?ooding shall not exceed 30°; and .3 the residual stability during intermediate stages of ?ooding shall not be less than that required by 2.7.2.1. 2.7.2 At ?nal equilibrium after ?ooding: .1 the righting lever curve shall have a minimum range of 20° beyond the position of equilibrium in association with a maximum residual righting lever of at least 0.1 m within the 20° range; the area under the curve within this range shall not be less than 0.0175 m-radians. The 20° range may be measured from any angle commencing between the position of equilibrium and the angle of 25° (or 30° if no deck immersion occurs). Unprotected openings shall not be immersed within this range unless the space concerned is assumed to be ?ooded. Within this range, the immersion of any of the openings listed in 2.7.1.1 and other openings capable of being closed weathertight may be permitted; and .2 the emergency source of power shall be capable of operating. Ship arrangements IGC CODE 2016 EDITION 37 Ship structure Passage Cargo tank 380 600/450 Figure 3.1 Passage Cargo tank 380 600/450 b/2 or 50 whichever is greater b Figure 3.2 380 380 Flat surface of ship structure Cargo tank Figure 3.3